Chemical product and method

Details Chemical product and method Chemical product and method

B - Operations, Transporting

01

J

B01J 13/02 (2006.01) B01J 13/14 (2006.01) B01J 13/18 (2006.01)

Patent

CA 2407170

The invention relates to thermally expandable microspheres comprising a thermoplastic polymer shell and a propellant entrapped therein, wherein said polymer shell is made of a homo- or co-polymer from ethylenically unsaturated monomers comprising more than 85 wt% of nitrile containing monomers and said propellant comprises at least 50 wt% of isooctane. The invention further relates to preparation and use of expandable microspheres, a composition comprising expandable microspheres and articles comprising foamed material containing expanded microspheres.

L'invention concerne des microsphères thermo-expansibles composées d'une coque en polymère thermoplastique qui renferme un propulseur. Cette coque polymérique est constituée d'un homopolymère ou copolymère issu de monomères éthyléniquement insaturés contenant plus de 85 % en poids de monomères contenant du nitrile. Ce propulseur comprend au moins 50 % en poids d'isooctane. L'invention concerne également la préparation et l'utilisation de microsphères expansibles, une composition contenant ces microsphères expansibles et des articles comprenant des microsphères expansées contenant un matériau mousse.

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